How to get High...Fast! Redux

 

Given the weather forecast for this past weekend, Electrical Power was kinda "iffy".  No power, no posting. So...You get a repeat from a few years ago.  

 No, Beans, this post has nothing to do with crack pipes. The idea came to me while reading a link I found on Instapundit a while back.  The post was fairly interesting as it discussed a proposal to modify F-15E's to carry a 45' long missile and launch it at altitude and speed.  Currently, most of a missile's fuel is used getting it off the ground and up to an altitude.  Launching it from altitude and speed would alleviate that problem.  

What caught my eye were a couple of things.  First, this.

The F-15D, at the top, ~35 years ago had my name painted on the canopy rail.  Glad to see she's still around and kicking.

The second thing that caught my eye was the launch profile they proposed to use.

I recognized it immediately.  It's called the Rutowski Climb profile.  For those of you who are engineering oriented, here's a detailed description. For those of you German Engineers, try this one out. And for those of you with a Naval background, here's one for you.

Basically, the objective is to get as much altitude and speed as possible in the least amount of time.  It was theorized and developed in the 70's as a means to defend against the MiG-25 Foxbat, a very fast, high flying fighter.  (That was proven to be somewhat overrated when Viktor Belenko defected in one in '76).  

In any case, the F-15 was used to test the theory and did so by busting several time to climb records in the Streak Eagle program.  Most of those records still stand.

I recognized it, because while stationed at Kadena, we practiced it because the Russian's had the MiG 25 in the area and it was rumored that the North Koreans had some also.

So, we would practice the maneuver pretty regularly.  We referred to them as the "High Fast Profile".  Our target referred to that portion of their mission as the "Low, Slow Profile".

Our Target
Source

We would intercept them as they returned to Kadena from "parts unknown".  We'd orbit in the mid 30's saving gas and GCI would commit us to the intercept at about 200 miles. Suffice it to say, they were WELL above us.

We'd turn hot, light the burners and begin the climb profile.  We'd push over to 0 g.  (Basically, Beans, my 200 Lb (then...now +) body would be weightless.) The engines were at max and we'd continue that descent until we were well above the Mach.  

Then we'd pull it into a climb to gain as much altitude as possible when we reached weapons range.  Timing of this maneuver was absolutely crucial.  Closure rates of 2000NM/hour were regular. To put that in layman's terms, that's 33.3 Nautical miles/minute or ~1 mile every 2 seconds.  So the intercept is either made or missed in less than 400 seconds.  

So, yeah, we practiced the Rutowski Climb profile....a lot.  In fact the highest I've ever been was the result of one.  GCI turned me hot at about 190NM.  (They needed training also, newish guy on the scope, didn't realize that 10 NM is critical.) Typically, the climb angle was about 45^o and the target indicator would be steady in the HUD.  That was not the case on this intercept, it was moving towards the top of the HUD.  

So, me being me, I kept pulling, making my climb angle steeper and steeper.  I pass through 50k' as he passes above me (Well Above) and I'm nearly vertical.  About this time, I learn an important lesson. Jet engines need air to run.  In addition, the flight controls need air to function.  There is very little air above 50K'.  

In short I'm riding a bullet with nothing to do until gravity takes pity on me and begins pulling me back to Earth.  That happened at 78,123' on my altimeter.  The sky was very dark and the SR-71 was a reddish-white.

The GCI guy and I reviewed my video tape in private.  No sense in causing consternation in our higher ups.

And THAT is why I recognized the Rutowski Climb Profile immediately.